Pope Martin V confirms Sicut Judaeis ("and thus to the Jews," better known as the "Constitution for the Jews"), a papal bull issued by Pope Calixtus II in 1120. It was originally intended to protect Jews who were being attacked all over Europe because of the First Crusade and it is reaffirmed by many later popes - a sign that it isn't being heeded.

Sicut Judaeis forbids forcible conversion of Jews, taking their property or harming them just because they are Jews, disrupting Jewish religious festivals, or vandalizing Jewish cemeteries. The punishment for all these is excommunication.